Coffee maker



FIG. 1 is a top and front perspective view of a coffee maker, showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a side elevational view thereof, taken from the right of FIG. 2;

FIG. 5 is a side elevational view thereof, taken from the left of FIG. 2;

FIG. 6 is a top elevational view thereof; and,

FIG. 7 is an bottom elevational view thereof. 

The ornamental design for a coffee maker, as shown and described. 